Integration of 1.3-$\mu{\rm m}$ Quantum-Dot Lasers With ${\rm Si}_{3}{\rm N}_{4}$ Waveguides for Single Mode Optical Interconnects

A single mode photonic integrated circuit, consisting of a monolithically integrated quantum-dot laser and a suitably designed
${\rm Si}_{3}{\rm N}_{4}$
waveguide, is demonstrated. The 1.3-
$\mu{\rm m}$
quantum-dot laser incorporates a superlattice barrier, p-doping, and tunnel injection in the active region, demonstrating operation up to 85
$^{\circ}{\rm C}$
with excellent temperature stability (high
${\rm T}_{0}$
). The two devices are optimally groove coupled to minimize the losses. Integration of the tapered waveguide with a quantum-dot cross laser is also demonstrated.